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Match the List-I with List-II List-I A Radio-wave B Micro-wave C Infrared-wave D X-ray List-II I is produced by Magnetron valve II Due to change in the vibrational modes of atoms III Due to inner shell electrons moving from higher energy level to lower energy level IV Due to rapid acceleration of electrons Choose the correct answer from the options given below:

1. A-II, B-IV, C-III, D-I
2. A-IV, B-III, C-I, D-II
3. A-IV, B-I, C-II, D-III
4. A-IV, B-II, C-I, D-III

Correct answer: A-IV, B-I, C-II, D-III

Solution

The correct matches are based on the physical processes that generate each type of wave. Radio-waves are produced by the rapid acceleration of electrons (A-IV), microwaves are generated by the Magnetron valve (B-I), infrared waves arise from changes in the vibrational modes of atoms (C-II), and X-rays are produced when inner shell electrons transition to lower energy levels (D-III).

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